Google’s artificial intelligence assistant Gemini has surpassed one billion monthly users, CEO Sundar Pichai announced Tuesday, a week after a major reorganization of the tech giant’s AI division. “It’s our fastest growing product ever,” and the 14th product to reach a billion users, Pichai posted on social media. Demis Hassabis, who won a Nobel Prize in chemistry, recently stepped back from the day-to-day management of Google DeepMind, the lab that designs the Gemini models. OpenAI reached one billion users across all its interfaces, led by ChatGPT, the lab announced in July without specifying whether that figure was monthly or weekly users. The San Francisco-based AI lab sparked the artificial intelligence boom when it launched its free ChatGPT app in November 2022, and thus built its user base from scratch in under four years.